# Queries and Issues faced with Logstash
**URL:** https://discuss.elastic.co/t/queries-and-issues-faced-with-logstash/117338
**Category:** Logstash
**Created:** [January 27, 2018, 10:53pm UTC](https://discuss.elastic.co/t/queries-and-issues-faced-with-logstash/117338 "2018-01-27T22:53:27Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@SawyerFord](https://discuss.elastic.co/u/SawyerFord)
#### Post date: [January 27, 2018, 10:53pm UTC](https://discuss.elastic.co/t/queries-and-issues-faced-with-logstash/117338/1 "2018-01-27T22:53:27Z")
I have 5 queries and issues faced with Logstash.
1. **Whether** I really need to configure logstash.conf with input and output plugins. I did not configured anything inside logstash.conf , any how I am getting logs in JSON.
2. My application also uses docker. **Should** I configure logstash inside docker(I am new to docker and the word image in it is very confusing, can't get enough of it)
3. **What** I observe is that the error stack captured inside ERROR attribute does not come line by line, but they are in a single line. The JSON format not able to detect \n inside the error logs
4. I get the below SL4J message in the logs at he bottom as in red colour. I like to provide JSON logging in our live application which generate thousands of logs daily, **does** this below message overrides/overwrites any error or debug logs
5. **Why** do some part of the logs don't come in JSON format
---
### Author:  [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)
#### Post date: [January 29, 2018, 7:14am UTC](https://discuss.elastic.co/t/queries-and-issues-faced-with-logstash/117338/2 "2018-01-29T07:14:51Z")
> Whether I really need to configure logstash.conf with input and output plugins. I did not configured anything inside logstash.conf , any how I am getting logs in JSON.
I don't understand the question. "logstash.conf" is not a standardized configuration filename so you don't need that file at all, but you obviously need inputs and outputs in _some_ file that Logstash reads if you want it to actually do something.
> My application also uses docker. Should I configure logstash inside docker(I am new to docker and the word image in it is very confusing, can't get enough of it)
I recommend storing the log files produced by an application persistently (either in a volume or a directory mounted from the host) and run Logstash in a separate container (or directly on the host) to process those files.
> Why do some part of the logs don't come in JSON format
This isn't the best place to ask why Logback doesn't behave as you expect.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [February 26, 2018, 7:15am UTC](https://discuss.elastic.co/t/queries-and-issues-faced-with-logstash/117338/3 "2018-02-26T07:15:00Z")
This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.